Elementor generates a separate CSS file for each post and stores it in wp-content/uploads/elementor/css. When the file is missing, unreadable, or the path is incorrect, the browser fails to load the stylesheet. The result is an unstyled page that falls back to the default theme appearance.
Server‑side factors such as file‑system permissions, incorrect upload_path, or aggressive caching also prevent the CSS file from being served. When the request returns a 404 or a cached HTML reference points to a non‑existent file, the page displays without Elementor styling.